CN107706954B - Power supply management device for while-drilling instrument - Google Patents
Power supply management device for while-drilling instrument Download PDFInfo
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- CN107706954B CN107706954B CN201610649312.4A CN201610649312A CN107706954B CN 107706954 B CN107706954 B CN 107706954B CN 201610649312 A CN201610649312 A CN 201610649312A CN 107706954 B CN107706954 B CN 107706954B
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- 238000005553 drilling Methods 0.000 title claims abstract description 44
- 230000004913 activation Effects 0.000 claims abstract description 21
- 238000002161 passivation Methods 0.000 claims abstract description 4
- 238000005070 sampling Methods 0.000 claims description 27
- 238000005259 measurement Methods 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 6
- 230000005669 field effect Effects 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 14
- 238000004891 communication Methods 0.000 description 6
- 238000011161 development Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000013543 active substance Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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- H02J2007/0067—
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Abstract
An instrument while drilling power management device, comprising: a clock circuit for providing a clock signal; the battery pack voltage measuring circuit is connected with the battery pack and used for measuring the voltage of the battery pack to obtain measured voltage data; the battery pack current measuring circuit is connected with the battery pack and used for measuring the current of the battery pack to obtain measured current data; the control circuit is connected with the clock circuit, the battery pack voltage measuring circuit and the battery pack current measuring circuit and used for generating a battery pack activation signal according to the clock signal, the measured voltage data and the measured current data; and the battery pack activation circuit is connected between the positive electrode and the negative electrode of the battery pack and is used for activating the battery pack according to the battery pack activation signal. The device not only can fully optimize the battery pack power supply efficiency of the while-drilling instrument (particularly a near-bit instrument), but also can avoid the passivation phenomenon caused by long-time non-use of the battery pack.
Description
Technical Field
The invention relates to the technical field of oil and gas exploration and development, in particular to a power supply management device of a drilling instrument.
Background
With the continuous development of petroleum and natural gas, the conventional oil and gas reservoirs in the early period are developed to be close to the end sound, and the development of unconventional oil and gas reservoirs and complex oil and gas reservoirs is carried out from shallow layers to deep layers at present. The use of directional well construction in these unconventional and complex reservoirs is becoming increasingly common.
With the continuous development of modern electronic measurement technology, near-bit instruments can measure engineering parameters such as well deviation and azimuth at a bit, and geological parameters such as resistivity and gamma in real time in the drilling process. Due to the special structure of the near-bit instrument, a battery pack, a near-bit measuring circuit, a sensor and the like in the near-bit instrument are all installed in a short section of about 1 meter of the near-bit in a highly compact mode. The conventional measurement while drilling (MWD/LWD) instrument is generally linked and installed at the drilling site, so that the storage and installation processes of the instrument and the battery pack are ensured without being linked with each other, and the consumption of the electric quantity of the battery pack is avoided. Because the near-bit instrument pup joint is tightly installed behind the bit and bears more serious vibration and impact, the reliability requirement of the near-bit instrument pup joint is extremely strict.
Due to the space limitation of the near-bit, the battery pack which can be installed is more limited, and only one battery pack supplies power. And the battery pack is difficult to replace at a drilling site, so that the requirement on power supply optimization management of the battery pack is higher.
Disclosure of Invention
In order to solve the above problems, the present invention provides a device for managing power supply of a while-drilling instrument, the device comprising:
a clock circuit for providing a clock signal;
the battery pack voltage measuring circuit is connected with the battery pack and used for measuring the voltage of the battery pack to obtain measured voltage data;
the battery pack current measuring circuit is connected with the battery pack and used for measuring the current of the battery pack to obtain measured current data;
the control circuit is connected with the clock circuit, the battery pack voltage measuring circuit and the battery pack current measuring circuit and used for generating a battery pack activation signal according to the clock signal, the measured voltage data and the measured current data;
and the battery pack activation circuit is connected between the positive electrode and the negative electrode of the battery pack and is used for activating the battery pack according to the battery pack activation signal.
According to one embodiment of the invention, the battery pack activation circuit comprises a controllable switch comprising: control port, first external port and the external port of second, wherein, the control port pass through first resistance with control circuit's corresponding control port is connected, the control port still pass through the second resistance with the negative pole of group battery is connected, first external port pass through the third resistance with the positive pole of group battery is connected, the external port of second with the negative pole of group battery is connected.
According to an embodiment of the present invention, the controllable switch is a field effect transistor, a gate of the field effect transistor forms a control port of the controllable switch, and a source and a drain form the first external port and the second external port, respectively.
According to an embodiment of the invention, the apparatus further comprises:
a storage circuit connected to the control circuit;
and the temperature detection circuit is connected with the control circuit and is used for acquiring the temperature data of the battery pack.
According to one embodiment of the invention, the control circuit is configured to generate status information of the battery pack based on the measured voltage data, the measured current data, the temperature data, and a clock signal.
According to an embodiment of the invention, the apparatus further comprises:
the switching circuit comprises a plurality of switching branches with the same structure, the input end of each switching branch is connected with the anode of the battery pack, the output end of each switching branch is connected with the corresponding measurement-while-drilling circuit, the control end of each switching branch is connected with the control circuit, and each switching branch can be controlled by the control circuit to be connected or disconnected between the corresponding measurement-while-drilling circuit and the battery pack.
According to one embodiment of the invention, the switching leg comprises:
first switching piece and second switching piece, wherein, the input and the output of first switching piece form respectively switch the input and the output of branch road, the input and the output of second switch respectively with the control end of first switching piece is connected with ground, the control end of second switch with control circuit's corresponding control port is connected, the control end of first switching piece still is connected with self input through resistance, the control end of second switching piece still is connected with self output through resistance.
According to one embodiment of the invention, the control circuit is configured to control the on-off of the corresponding switching branch according to the operating characteristics of each measurement-while-drilling circuit.
According to one embodiment of the invention, the control circuit is configured to control the on-off of the corresponding switching branch circuit according to the working priority parameter of each measurement-while-drilling circuit, so as to control the on-off of the electrical connection between each measurement-while-drilling circuit and the battery pack.
According to one embodiment of the present invention, the battery pack current measuring circuit includes:
a sampling resistor connected to a positive electrode of the battery pack;
and two input ends of the voltage sampling circuit are respectively connected with two ends of the sampling resistor, and the output end of the voltage sampling circuit is connected with the control circuit.
The power supply management device for the while-drilling instrument can fully optimize the power supply efficiency of the battery pack of the while-drilling instrument (particularly a near-bit instrument). The device can also avoid the passivation phenomenon that the group battery appears because of not using for a long time, and simultaneously, through optimizing power supply control, the device can also prolong the time when following the power supply of boring the instrument. In addition, the device can record the working parameters of the battery pack completely (such as the voltage of the battery pack, the current of the battery pack, the temperature and the like), thereby providing data support for subsequent analysis of the working state of the battery pack and system optimization.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required in the description of the embodiments or the prior art:
FIG. 1 is a schematic structural diagram of a power management device for a while-drilling instrument according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a clock circuit according to one embodiment of the present invention;
FIG. 3 is a schematic diagram of a battery pack voltage measurement circuit according to one embodiment of the present invention;
FIG. 4 is a schematic diagram of a voltage sampling circuit according to one embodiment of the present invention;
fig. 5 is a schematic diagram of the structure of a battery pack activation circuit according to one embodiment of the present invention;
FIG. 6 is a circuit schematic of a memory circuit according to one embodiment of the invention;
FIG. 7 is a circuit schematic of a temperature sensing circuit according to one embodiment of the present invention;
FIG. 8 is a schematic diagram of a communication circuit according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a switching leg according to an embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details or with other methods described herein.
After the battery pack of the near-bit instrument is installed, the battery pack is often not used for a long time due to the uncertainty of storage, transportation and field use time. When the battery pack is not used for a long time, part of active substances on the polar plates lose activity, so that the battery pack is passivated. When the battery pack is passivated, the battery pack will appear to be charged indicating full charge, and upon a rapid drop in the use voltage, the battery pack will have a significantly reduced capacity compared to the normal state.
Aiming at the problems in the prior art, the invention provides a novel power supply management device for a while-drilling instrument, which is particularly suitable for the optimized management of power supply in a near-bit measuring instrument, thereby improving the utilization rate of electric energy.
Fig. 1 shows a schematic structural diagram of a power supply management device of a while-drilling instrument in the present embodiment.
As shown in fig. 1, the power supply management device provided in the present embodiment includes: a control circuit 101, a clock circuit 102, a battery voltage measurement circuit 103, a battery current measurement circuit 104, and a battery activation circuit 105.
The clock circuit 102 is connected to the control circuit 101, and is configured to generate an always signal and transmit the clock signal to the control circuit 101. Specifically, in the present embodiment, a circuit diagram of the clock circuit 102 is shown in fig. 2. As shown in fig. 2, the clock signal 102 provided by the present embodiment includes a crystal oscillator Y1 and a real-time clock chip U4. The oscillation frequency of the crystal oscillator Y1 is preferably configured to be 32.768KHz, the real-time clock chip U4 is preferably realized by adopting a DS1308 chip, and the DS1308 is a low-power-consumption binary-coded decimal (BCD) clock/calendar and is additionally provided with 56 bytes of NV RAM. For the DS1308 chip, addresses and data are transmitted serially over the I2C bus, which can provide second, minute, hour, week, day, month and year information. For months less than 31 days, it is possible to automatically adjust the end of month date, including leap year corrections.
As shown again in fig. 1, a battery voltage measuring circuit 103 is connected to the battery for measuring the voltage of the battery 111 (i.e. the voltage across the positive and negative poles of the battery) to obtain measured voltage data. The control circuit 101 is connected to the output end of the battery pack voltage measuring circuit 103, and can calculate the voltages at the positive and negative ends of the battery pack 111 according to the measured voltage data transmitted from the voltage measuring circuit 103.
Fig. 3 shows a circuit schematic of the battery voltage measurement circuit 103. As can be seen from fig. 3, the battery pack voltage measurement circuit 103 provided in the present embodiment includes: the amplifier circuit comprises an amplifier chip U2, a voltage division resistor R5, a resistor R6 and a resistor R7. One end of the resistor R5 is connected to the positive electrode of the battery pack 111 (i.e., the IN + terminal shown IN fig. 3), the other end is connected to the resistor R6, and the other end of the resistor R6 is connected to ground (i.e., the negative electrode of the battery pack 111). The common connection terminal of the resistor R5 and the resistor R6 is connected to the positive terminal of the input terminal of the amplifier chip U2, the negative terminal of the input terminal of the amplifier chip U2 is connected to the output terminal thereof, and the output terminal thereof (i.e., the OUT3 terminal shown in fig. 3) is connected to the control circuit 101 through the resistor R7.
In this embodiment, the amplifier chip U2 is preferably implemented by an AD8031 chip, the resistance of the resistor R5 is preferably configured to be 180k Ω, the resistance of the resistor R6 is preferably configured to be 20k Ω, and the resistance of the resistor R7 is preferably configured to be 10 Ω.
As shown again in fig. 1, a battery pack current measuring circuit 104 is connected to the positive electrode of the battery pack 111, and is used to measure the output current of the battery pack 111, thereby obtaining measured current data. The control circuit 101 is connected to the output terminal of the battery current measuring circuit 104, and can calculate the magnitude of the output current of the battery 111 according to the measured current data transmitted from the battery current measuring circuit 104.
Specifically, as shown in fig. 1, in the present embodiment, the battery pack current measurement circuit 104 preferably includes: a sampling resistor R1 and a voltage sampling circuit 104 a. The sampling resistor R1 is connected in the conductive loop of the battery pack 111, two input ends of the voltage sampling circuit 104a are respectively connected with two ends of the sampling resistor R1, and an output end of the voltage sampling circuit 104a is connected with the control circuit. After receiving the sampled voltage signal transmitted from the voltage sampling circuit 104a, the control circuit 101 can calculate the current value flowing through the sampling resistor R1 according to the ratio of the sampled voltage signal to the resistance value of the sampling resistor R1, wherein the current value is approximately equal to the current value output by the battery pack 111.
Fig. 4 shows a schematic structural diagram of the voltage sampling circuit in the present embodiment. As can be seen from fig. 4, in the present embodiment, the voltage sampling circuit 104a preferably includes: high voltage sampling chip U1, capacitor C2 and resistor R8. The high-voltage sampling chip U1 is implemented by using LT6100, a capacitor C2 is connected between the FIL port of the LT6100 chip and ground, two input terminals IN-and IN + of the LT6100 are respectively connected to two ends of a sampling resistor R1, and an output terminal of the LT6100 forms an output port OUT1 of the voltage sampling circuit through a resistor R8 and is connected to the control circuit 101. In this embodiment, the signal transmitted from the LT6100 chip received by the control circuit 101 is a signal representing voltages at two ends of the sampling resistor R1, and since the resistance value of the sampling resistor R1 is known, the control circuit 101 can calculate the current value output by the battery pack 111 according to the ratio of the voltages at two ends of the sampling resistor R1 to the resistance value thereof, thereby realizing measurement of the battery pack current value.
As shown again in fig. 1, in the present embodiment, the battery pack activation circuit 105 is connected between the positive and negative poles of the battery pack 111. The control circuit 101 is capable of generating a battery activation signal from the real-time clock signal generated by the clock circuit 102, the measurement voltage data generated by the battery voltage measurement circuit 103, and the measurement current data generated by the battery current measurement circuit 104. The battery pack activation circuit 105 performs a high current discharge on the battery pack 111 according to the battery pack activation signal, thereby activating the battery pack 111.
Specifically, as shown in fig. 5, the battery pack activation circuit 105 provided in the present embodiment preferably includes a controllable switch Q1. The controllable switch Q1 is formed with a control port, a first external port, and a second external port. A control port of the controllable switch Q1 is connected to a corresponding control port (i.e., the CTRL1 port) of the control circuit 101 through a first resistor R2, the control port is also connected to ground (i.e., the negative pole of the battery pack 111) through a second resistor R4, a first external port of the controllable switch Q1 is connected to the positive pole IN + of the battery pack 111 through a third resistor R3, and a second external port is connected to ground.
In this embodiment, the controllable switch Q1 is preferably implemented by a field effect transistor chip IRF9024, the resistance of the pull-down resistor R4 is configured to be 100k Ω, the resistance of the input resistor R2 is configured to be 1k Ω, and the resistance of the discharge resistor R3 is configured to be a high-power resistor with a resistance of 50 Ω and a power of 10W.
When the control circuit generates a high-level battery pack activation signal, the connection between the source and the drain of the field-effect transistor Q1 is conducted, the positive electrode of the battery pack is equivalent to the connection with the ground (i.e. the negative electrode of the battery pack) through the discharge resistor R3, and as the resistance value of the discharge resistor R3 is small, the large-current discharge of the battery pack, i.e. the activation processing of the battery pack, can be realized, so that the performance of the battery pack is optimized.
As shown in fig. 1 again, the device for power management while drilling provided in this embodiment further includes: a storage circuit 106, a communication circuit 107, a temperature detection circuit 108, a switching circuit 109, and a DC/DC conversion circuit 112. The communication circuit 107 is connected to the control circuit 101, and can exchange data with other devices/apparatuses. The temperature detection circuit 108 is connected to the control circuit 101 and is capable of collecting temperature data of the battery pack or the entire device and transmitting the data to the control circuit. The storage circuit 106 is also connected to the control circuit 101, and is used for storing data transmitted from the control circuit 101. For example, in the present embodiment, the control circuit 101 may dump the received clock signal, the measured voltage data, the measured current data, the temperature data, and the like into the storage circuit 106. The DC/DC conversion circuit 112 is connected to the positive electrode of the battery pack 111, and is capable of converting the voltage output by the battery pack 111 to form various operating voltages suitable for the requirements of the while-drilling equipment.
In this embodiment, the control circuit 101 can also generate the state information of the battery pack according to the received clock signal, the measured voltage data, the measured current data, the temperature data, and the like, so that the user can quickly and completely analyze the life cycle and the working state of the battery pack.
Fig. 6 shows a circuit schematic diagram of the memory circuit provided in the present embodiment. As can be seen from fig. 6, in the present embodiment, the memory chip U5 used by the memory circuit 106 is preferably implemented by using a 1Mbit memory AT24CM01, which has a storage capacity sufficient to completely store the relevant data.
Fig. 7 shows a circuit schematic diagram of the temperature detection circuit 108 provided in the present embodiment. As can be seen from fig. 7, the temperature sensor chip U3 used by the temperature detection circuit 108 is preferably implemented using a temperature sensor chip LM80, wherein a decoupling capacitor connected between a power supply positive electrode of the temperature sensor chip and ground is preferably configured to be 0.1 μ F. The output OUT2 of the temperature sensing circuit 108 is connected to a corresponding port of the control circuit, which is capable of transmitting sensed temperature data to the control circuit.
Fig. 8 shows a circuit diagram of the communication circuit provided in the present embodiment. As can be seen from fig. 8, the communication chip U6 used by the communication circuit 107 employs a 485 bus conversion chip MAX 485.
As shown in fig. 1 again, the power supply management apparatus for while-drilling equipment provided in this embodiment further includes a switching circuit 109. The switching circuit 109 includes a plurality of switching branches having the same structure, an input end of each switching branch is connected to the positive electrode of the battery pack 111, an output end of each switching branch is connected to a corresponding measurement-while-drilling circuit, and a control end of each switching branch is connected to a corresponding control port of the control circuit 101. Each switching branch can turn on or off the connection between the corresponding measurement-while-drilling circuit and the battery pack under the control of the control circuit 101.
Specifically, as shown in fig. 1, in the power supply management device provided in this embodiment, the switching circuit 109 includes 3 switching branches (i.e., a first switching branch SW1, a second switching branch SW2, and a third switching branch SW3), and output ends of the three switching branches are respectively connected to the measurement-while-drilling circuits corresponding thereto, that is, an output end of the first switching branch SW1 is connected to the first measurement-while-drilling circuit 110a, an output end of the second switching branch SW2 is connected to the second measurement-while-drilling circuit 110b, and an output end of the third switching branch SW3 is connected to the first measurement-while-drilling circuit 110 c.
In this embodiment, the structures of the switching branches included in the switching circuit 109 are the same, so that the description is convenient, and the specific circuit structure of the switching branch is further described below by taking a certain switching device as an example.
Fig. 9 shows a schematic circuit configuration diagram of the switching branch SW1 in the present embodiment.
As shown in fig. 9, in the present embodiment, the switching branch SW1 includes: a first switching element Q2 and a second switching element Q3. The input end and the output end of the first switching element Q2 form an input end IN + and an output end VCC of a switching branch SW1, the input end and the output end of the second switching element Q3 are connected with the control end of the first switching element Q2 and the ground, the control end of the second switching element Q3 is connected with a corresponding control port SW _ CTRL1 of the control circuit 101, the control end of the first switching element Q2 is further connected with the input end thereof through a resistor R10, and the control end of the second switching element Q3 is also connected with the output end thereof through a resistor R9.
In this embodiment, the first switching device Q2 is preferably implemented by a fet IRF90254, the second switching device Q3 is preferably implemented by a fet IRLD120, the resistance value of the pull-up resistor R10 is preferably configured to be 100k Ω, and the resistance value of the pull-down resistor R9 is preferably configured to be 100k Ω.
In this embodiment, the control circuit 101 can control the on/off of the corresponding switching branch according to the condition of the battery pack 111 and the operating characteristics of each measurement while drilling circuit, so as to provide an optimized power supply mode. Specifically, for example, the measurement of the engineering parameters in the first measurement-while-drilling circuit 110a may be performed intermittently, and the control circuit 101 may turn off the switching branch SW1 when the first measurement-while-drilling circuit 110a is in the non-measurement period, so as not to supply power to the first measurement-while-drilling circuit 110 a.
In addition, when the remaining power of the battery pack 111 is not large (for example, the remaining power of the battery pack 111 is smaller than a preset power threshold), the control circuit 101 may further control the on/off of the corresponding switching branch circuit according to the working priority parameter of each measurement-while-drilling circuit, so as to control the on/off of the electrical connection between each measurement-while-drilling circuit and the battery pack. Specifically, for example, when the remaining amount of the battery pack 111 is not large, the control circuit 101 may disconnect the power supply of the first measurement-while-drilling circuit 110a with a lower operation priority by disconnecting the switch branch SW1, so as to ensure the normal power supply of the other measurement-while-drilling circuits with a higher priority.
It should be noted that, in other embodiments of the present invention, the specific circuit structure, the chip type, and the device value adopted by each circuit may be other reasonable structures, types, and values, and the present invention is not limited thereto.
As can be seen from the above description, the power supply management device for an while-drilling instrument provided by the present embodiment can substantially optimize the battery power supply efficiency of the while-drilling instrument (especially, a near-bit instrument). The device can also avoid the passivation phenomenon that the group battery appears because of not using for a long time, and simultaneously, through optimizing power supply control, the device can also prolong the time when following the power supply of boring the instrument. In addition, the device can record the working parameters of the battery pack completely (such as the voltage of the battery pack, the current of the battery pack, the temperature and the like), thereby providing data support for subsequent analysis of the working state of the battery pack and system optimization.
It is to be understood that the disclosed embodiments of the invention are not limited to the particular structures or process steps disclosed herein, but extend to equivalents thereof as would be understood by those skilled in the relevant art. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.
Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, the appearances of the phrase "one embodiment" or "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.
While the above examples are illustrative of the principles of the present invention in one or more applications, it will be apparent to those of ordinary skill in the art that various changes in form, usage and details of implementation can be made without departing from the principles and concepts of the invention. Accordingly, the invention is defined by the appended claims.
Claims (7)
1. A power management apparatus for a near-bit measurement instrument, the apparatus comprising:
a clock circuit for providing a clock signal;
the battery pack voltage measuring circuit is connected with only one battery pack of the near-bit measuring instrument and is used for measuring the voltage of the battery pack to obtain measured voltage data;
the battery pack current measuring circuit is connected with the battery pack and used for measuring the current of the battery pack to obtain measured current data;
the control circuit is connected with the clock circuit, the battery pack voltage measuring circuit and the battery pack current measuring circuit and used for generating a battery pack activation signal according to the clock signal, the measured voltage data and the measured current data and controlling the on-off of the corresponding switching branch circuit according to the condition of the battery pack and the working characteristics or working priority parameters of each measurement while drilling circuit so as to control the on-off of the electric connection between each measurement while drilling circuit and the battery pack;
the battery pack activation circuit is connected between the positive electrode and the negative electrode of the battery pack and used for carrying out strong current discharge on only one group of battery packs according to the battery pack activation signal so as to realize activation processing and avoid passivation phenomenon caused by long-time non-use of the battery packs; the battery pack activation circuit comprises a controllable switch comprising: the control circuit comprises a control port, a first external port and a second external port, wherein the control port is connected with a corresponding control port of the control circuit through a first resistor, the control port is also connected with a negative electrode of the battery pack through a second resistor, the first external port is connected with a positive electrode of the battery pack through a third resistor, and the second external port is connected with the negative electrode of the battery pack and the ground;
the switching circuit comprises a plurality of switching branches with the same structure, the input end of each switching branch is connected with the anode of the battery pack, the output end of each switching branch is connected with the corresponding measurement-while-drilling circuit, the control end of each switching branch is connected with the control circuit, and each switching branch can be controlled by the control circuit to be connected or disconnected between the corresponding measurement-while-drilling circuit and the battery pack.
2. The apparatus of claim 1, wherein the controllable switch is a field effect transistor, a gate of the field effect transistor forms a control port of the controllable switch, and a source and a drain form the first external port and the second external port, respectively.
3. The apparatus of claim 1, wherein the apparatus further comprises:
a storage circuit connected to the control circuit; and/or the presence of a gas in the gas,
and the temperature detection circuit is connected with the control circuit and is used for acquiring the temperature data of the battery pack.
4. The apparatus of claim 3, wherein the control circuit is configured to generate the state information of the battery pack based on the measured voltage data, the measured current data, the temperature data, and a clock signal.
5. The apparatus of claim 1, wherein the switching leg comprises:
first switching piece and second switching piece, wherein, the input and the output of first switching piece form respectively switch the input and the output of branch road, the input and the output of second switch respectively with the control end of first switching piece is connected with ground, the control end of second switch with control circuit's corresponding control port is connected, the control end of first switching piece still is connected with self input through resistance, the control end of second switching piece still is connected with self output through resistance.
6. The apparatus of claim 1 or 5, wherein the control circuit is configured to control the switching of the corresponding switching branch based on operational characteristics of each measurement-while-drilling circuit.
7. The apparatus of any of claims 1-5, wherein the battery pack current measurement circuit comprises:
a sampling resistor connected to a positive electrode of the battery pack;
and two input ends of the voltage sampling circuit are respectively connected with two ends of the sampling resistor, and the output end of the voltage sampling circuit is connected with the control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610649312.4A CN107706954B (en) | 2016-08-09 | 2016-08-09 | Power supply management device for while-drilling instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| US9567835B2 (en) * | 2013-02-27 | 2017-02-14 | Evolution Engineering Inc. | System and method for managing batteries for use in a downhole drilling application |
| US20160145974A1 (en) * | 2014-11-23 | 2016-05-26 | Ahmed Tahoun | Apparatus and method for power management of downhole tool |
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